I read in a earlier post about the numbers on Road Force Balance is now lower than 24, could someone come up with the reference or bulletin number on this. I just had mine rebalanced and being under 24, GM specs, they( I mean the service dept and GM customer service) closed my case because their within specs and that's all they can do. I believe mine could be wheels and tires from what the readings on the vibration analyzer read. I still have vibrations in my seat and wheel.